k, for the tail issue, sounds likr your swashplate needs to be leveled or it's too heavy in the tail. If you hold the heli by the flybar (with main rotors facing front and back) does the heli sit with it's tail lower or are the skids level? If it's level then the swashplate needs adjusting and leveled, be carefull tho, to mutch adjusting of the plate can cause blade pitch issues.

as far as the weights, stock your heli only has 2 weights, the inner collars are not weights they are collers to hold the flybar in place. Usually for us beginners the smaller weights should be all the way out and some people do add another set to their heli. Always leave the collars in where they are.

for blade tracking, what I do is place a piece of color tape on one blade and when I spin up I watch to see which one is lower then adjust the pushrod for that blade, but remember if you have a bent shaft or bent spindle, the blades might not track at all, watch your blade pitch too when adjusting.

I think thats all the correct information, if not I'm sure aomeone will correct me....